Electric generator.



c. A. STICKNEY.

ELECTRIC GENERATOR. APPLICATION FILE D JUNE 20, I913. 1,143,662. Patented June 22, 1915.

C. A. STICKNEY.

ELECTRIC GENERATOR.

APPLICATION FILED JUNE 20. I913.

2 SHEETS-SHEET Z.

JDZYMM Patented June 22, 1915.

' many parts UNITED STATES PATENT OFFICE.

. CHARLES A. STIGKNEY, OF ST. PAUL, MINNESOTA.

ELECTRIC GENERATOR.

Specification of Letters Patent.

Application filed June 20, 1913. Serial No. 774,814.

To all whom it may concern:

Be it known that I, CHARLES A. STIGKNEY, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvementin Electric Generators, of which the following is a specification.

This invention relates to an improved generator, Whose principal use is produc ng sparking in an internal combustion engine for igniting the charges of fuel mixture.

It has been customary in connection with large internal combustion engines to employ a small generator for producing a sparking current 111 the combustion chamber, but it has been difficult to start engines particularly of the larger type while usmg the generator current, and 1n order to overcome this objection it has been usual to use an auxiliary apparatus such as primary and secondary batteries and a spark coil connected in series with the batteries for producing this current when starting, and after the engine has-started to disconnect the auxiliary apparatus and throw into operation the magneto generator and continue the operation of the engine while using current tion is complicated and laborious as well as being subject to disorder on account of the employed andits use by'mexperienced persons. My invention 1s designed to overcome these ob ections 1n a simple and inexpensive manner whereby my improved generator may be used to produce an extra powerful sparking current on large types of engines when starting and the usual strength of current when running.

The apparatus which I have produced is substantially fool proof and can be operated by persons unfamiliar with the particular branch of mechanical and electrical arts to which this invention relates.

My invention further contemplates a simple and effective design of generator and advantageous mode of mounting it for use.

In the accompanying drawings forming part of this specification, Figure 1 is a side elevation of a gas engine showing my invention applied thereto in use; Fig. 2 is a side elevation of my invention shown mounted upon a detail portion. of the pump belonging to the engine; Fig. 3 is a section taken upon the line X.X of Fig. 2; Fig. 4 is a section taken upon the line YY of Fig. 2; Fig. 5 is a side elevation partly This mode of operasection of the sprocket which is mounted upon the pump shaft of the engine for actuating my improved generator, a portion of said sprocket being broken away to more fully expose its construction, and Fig. 6 is a plan of the sprocket illustrated in Fig. 5, a portion of the view being in section upon the line Z Z Fig. 5.

Inthe drawings A indicates an internal combustion engine of ordinary construction adapted for operation by the use of gasolene and other fuel liquids and gases. In the combustion chamber of this engine the usual igniter not illustrated is efiectively located which is adapted to derive its energy from a current of electricity produced by a generator such as a magneto. Associated with this engine is a vertical pump chamber B of the usual type which in connection with my invention forms asuitable support on which my improved magneto generator C is mounted by means to be hereinafter described.

The magneto generator constituting my invention may be of suitable form that illustrated being designed for the special purpose for which it is intended. This generator is provided with a field frame D composed of two side members 2 and 3 having pole tips 4 and 5, said sides being joined by field cores E and F (see Fig. 2) These iirld cores are adapted to carry the usual field windings not illustrated. The entire frame including the sides and field cores are made integral out of suitable magnetic material and the side 3 is formed with a vertical channel member 6, the channel groove 7 of which (see Fig. 4) is adaptedto fit snugly over the surface of the vertical pump casing B. To secure the motor frame to the pump casing in the position mentioned, a recess 8 is formed in the channelface of the channel member 6 immediately opposite the end of each of the core members E and F and a band of metal or other suitable material 9 is adapted to encircle the pump chamber with its ends 10 overlapping and secured over a bolt 11 below its head 12 lying in said recess 8. Said bolt 11 is passed longitudinally. through the passage 12' in the core member adjacent said recess, there being one band and a corresponding bolt for each core.

the pump chamber by turning the nuts 13 i on the bolts down tightly, thus holding the around said sprockets, rigidlysec'ured to the frame of the structure firmly against the pump chamber so that it will not slip. The usual armature G (see Fig. 4) is rotatably mounted between the pole pieces in the frame of the structure by its shaft 14 wh1ch is journaled in the end pieces 15 and 16 on the motor frame said end pieces bem secured to the motor frame by means of the screws 17. The usual brushes 18 and 19 are also provided which are adapted to sweep in contact with the usual current collector elements 20 upon the shaft 14.

Journaled upon the end pieces 15 and 16 parallel with the shaft of the armature isa counter shaft 21 which is operatively connected with the armature shaft by the intermeshing 'pinion and gear 22 and 23, respectively mounted upon the armature shaft and on the counter shaft. A handle 24 1s secured to'one end of the counter shaft by which it can be turned to revolve the armature and generate a current of electricity for sparking purposes in the engme when desired. To revolve the armature automatically when the driven shaft H of the engine is revolving, a connection is made wlth the pump shaft I of the engine by means of sprockets 25 and 26 and a chain 27 passing the sprocket 25 being end of the shaft 21 on the opposite end of which the handle 24 is mounted, and the sprocket 25 being ournaled upon the detachable section 28 of the 'pump shaft I. The detachable section 28 1s coaxial withand secured to the end of the pump shaft by the threaded connectlon 29 I and carries the cam 30 by which the pumpby the clutch. The

ing mechanism 31 of the engine is actuated.

'Interposed between the sprocket 26 and its journal support on the extension 28 of the shaft I is a suitable clutch J whereby rotation of the shaft I and its extension in one direction is adapted to-cause the revolution of the sprocket 26 and when it is desiredto operate the magneto generator by means of the handle 24, said clutch connection allows the revolution of the armature G to take place in the same forward direction independent of the rotation of the shaft I. The outer end of the extension 28 is formed with an enlarged circular journal bearing 33 having at its inner side a flange 34. The sprficket 26 which is formed with a centra y the journal bearing 33 and is held laterally between the flange 34 and a plate 36, the latter being secured to the journal by the screws 37. The sprocket 36 is freely supported by the journal between these lateral supports-34 and 36 so that it is free to revolve on said bearing except when engaged clutch consists of a pair of dogs 38 and 39, which are seated in a diametrical passage 40-across the journal hearing 33, said dogs being thrust radially disposed opening 35 is seated upon against the inner surface of the sprocket 26 by means of the expansion spring 41 lying in said passage. The inner circular surface 35 of the sprocket 26 is formed with a air of oppositely disposed-shoulders 42 an 43 (see Fig. 5), with which said dogs are adapted to engage when the shaft I is revolved forwardly by the engine. The surfaces 44 and 45 adjacent the shoulders 42 and 43 slant inwardly so that the dogs will sweep over theshoulders 42 and 43 when the sprocket 26 is revolved forward through the operation of the magneto generator by .the use of the handle 24. The revolution of the shaft I is automatically produced by the intermeshing gear wheels 46 and 47, the former being mounted upon the main drive shaft H of the engine and the latter mounted upon the pump shaft I. i

In operation when it is desired to start the engine, the 'motor generator is operated by hand by turning the handle 24. This operation is adapted to produce an extra spark in the combustion chamber because of the comparatively large gear 23 and small pinion 20. As soon as the fly wheel 48 of the engine is revolved by hand sufficiently an explosion is adapted to take place in the engine and the further revolution of the drive shaft 14 continued whereupon the hand operation of the magneto is disc0ntinned and the engine automatically continues the revolution of the armature at the necessary speed to produce the requisite sparking in the combustion chamber.

In accordance with the patent statutes I have described the principles of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereof but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth said generator is operably associated, a

crank for rotating said element by hand, and means connecting said actuating element with said motor shaft for automatically driving said generator.

2. The combination with -an explosive motor and its shaft having a gear wheel, of pump mechanism having a shaft provided w1th a gear wheel and sprocket, said gear strong current of electricity and a strong wheels intermeshing, an electrical generator having a shaft, a pinion carried by said generator shaft, a counter shaft having a gear meshing with said pinion, means for manually operating said counter-shaft, a sprocket carried by said counter-shaft, a sprocket chain connecting said last mentioned sprocket with the sprocket on said pump shaft, and a clutch associated with 10 the pump sprocket whereby said generator CHARLES A. STICKNEY.

Witnesses:

E. GRAHAM, C. D. ENOCHB. 

